client.h
#ifndef CLIENT_H
#define CLIENT_H
#include "link.h"
#include "protocol.h"
#include <string.h>
#define MAX_DATA_LEN 64
int makeSocket();
void makeConnect(int sockfd);
void makeReadThread(int sockfd);
void getUsrListFromPDU(PDU *pPDU);
void showChatData(PDU *pPDU);
void *readThread(void *arg);
void readDataFromSTDIN(char caData[MAX_DATA_LEN]);
#endif // CLIENT_H
client.c
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h> //struct sockaddr_in
#include <string.h>
#include <errno.h>
#include <pthread.h>
#include <unistd.h>
#include <stdlib.h>
#include "client.h"
List *pList = NULL;
uint g_iId = 0;
void getUsrListFromPDU(PDU *pPDU)
{
if (NULL == pPDU || NULL == pList)
{
return;
}
int iNum = pPDU->iDataLen / sizeof(int);
Node *pNode = NULL;
int i = 0;
while (iNum)
{
pNode = makeNode();
if (NULL == pNode)
{
return;
}
memcpy(&(pNode->iId), pPDU->caData+i*sizeof(int)
, sizeof(int));
insertList(pList, pNode);
i++;
iNum--;
}
if (0 == g_iId)
{
pNode = pList->pFirstNode;
while (NULL != pNode->pNext)
{
pNode = pNode->pNext;
}
g_iId = pNode->iId;
}
showList(pList);
}
void showChatData(PDU *pPDU)
{
if (NULL != pPDU)
{
char caMsg[MAX_DATA_LEN] = {'\0'};
memcpy(caMsg, pPDU->caData, pPDU->iDataLen);
printf("%d says: %s\n", pPDU->iFromId, caMsg);
}
}
void *readThread(void *arg)
{
int sockfd = (int)arg;
PDU *pPDU = NULL;
uint iType = 0;
while (1)
{
pPDU = readPDU(sockfd);
iType = parsePDU(pPDU);
switch (iType)
{
case ENUM_MSG_RESPONSE_USR_LIST:
getUsrListFromPDU(pPDU);
break;
case ENUM_MSG_GROUP_CHAT:
case ENUM_MSG_PRIVATE_CHAT:
showChatData(pPDU);
break;
default:
break;
}
}
return NULL;
}
void readDataFromSTDIN(char caData[MAX_DATA_LEN])
{
memset(caData, '\0', MAX_DATA_LEN);
int ret = read(STDIN_FILENO, caData, MAX_DATA_LEN);
if (-1 == ret)
{
perror("read");
return;
}
if ('\0' != caData[MAX_DATA_LEN-1]
&& '\n' != caData[MAX_DATA_LEN-1])
{
while ('\n' != getchar())
{}
}
caData[MAX_DATA_LEN-1] = '\0';
}
int makeSocket()
{
int sockfd = socket(AF_INET
, SOCK_STREAM
, 0);
if (-1 == sockfd)
{
perror("socket");
exit(EXIT_FAILURE);
}
return sockfd;
}
void makeConnect(int sockfd)
{
int ret = -1;
struct sockaddr_in serverAddr;
serverAddr.sin_family = AF_INET;
serverAddr.sin_port = htons(8888);
serverAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
bzero(&(serverAddr.sin_zero), 8);
ret = connect(sockfd, (struct sockaddr *)&serverAddr
, sizeof(serverAddr));
if (-1 == ret)
{
perror("connect");
exit(EXIT_FAILURE);
}
}
void makeReadThread(int sockfd)
{
int ret = -1;
pthread_t thread;
ret = pthread_create(&thread, NULL
, readThread, (void*)sockfd);
if (0 != ret)
{
printf("%s\n", strerror(ret));
exit(EXIT_FAILURE);
}
}
main.c(client)
#include "client.h"
extern List *pList;
extern uint g_iId;
int main(void)
{
pList = makeList();
if (NULL == pList)
{
return -1;
}
int sockfd = -1;
sockfd = makeSocket();
makeConnect(sockfd);
makeReadThread(sockfd);
//write data to server
char caData[MAX_DATA_LEN] = {'\0'};
int iLen = 0;
PDU *pPDU = NULL;
int iToId = 0;
char caMsg[MAX_DATA_LEN] = {'\0'};
while (1)
{
//1002 hello
readDataFromSTDIN(caData);
memset(caMsg, '\0', MAX_DATA_LEN);
sscanf(caData, "%d%s", &iToId, caMsg);
iLen = strlen(caMsg);
if (iLen > 0)
{
pPDU = makePDU(iLen);
memcpy(pPDU->caData, caMsg, iLen);
pPDU->iFromId = g_iId;
if (0 == iToId)
{
pPDU->iType = ENUM_MSG_GROUP_CHAT;
}
else
{
pPDU->iToId = iToId;
pPDU->iType = ENUM_MSG_PRIVATE_CHAT;
}
sendPDU(sockfd, pPDU);
}
}
return 0;
}
server.h
#ifndef SERVER_H
#define SERVER_H
#include <stdio.h>
#include "link.h"
#include "protocol.h"
void sendUsrListToClient(int sockfd, const List *pList);
void updateClientsUsrList(const List *pList);
void handleGroupChat(PDU *pPDU);
void handlePrivateChat(PDU *pPDU);
void *handleClient(void *arg);
int makeSocket();
void makeBind(int sockfd);
void makeListen(int sockfd);
int makeAccept(int sockfd);
void makeHandleClientThread(int sockfd);
void storeClientInfo(int sockfd);
#endif // SERVER_H
server.c
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h> //struct sockaddr_in
#include <errno.h>
#include <string.h>
#include <pthread.h>
#include <stdlib.h>
#include "server.h"
List *pList = NULL;
uint iBaseId = 1001;
void sendUsrListToClient(int sockfd, const List *pList)
{
if (sockfd < 0 || NULL == pList)
{
return;
}
int iDataLen = pList->iLen * sizeof(int);
PDU *pPDU = makePDU(iDataLen);
if (NULL == pPDU)
{
return;
}
Node *pNode = pList->pFirstNode;
int i = 0;
while (NULL != pNode)
{
memcpy(pPDU->caData+i*sizeof(int)
, &(pNode->iId), sizeof(int));
i++;
pNode = pNode->pNext;
}
pPDU->iType = ENUM_MSG_RESPONSE_USR_LIST;
sendPDU(sockfd, pPDU);
}
void updateClientsUsrList(const List *pList)
{
if (NULL == pList)
{
return;
}
PDU *pPDU = makePDU(sizeof(int));
if (NULL == pPDU)
{
return;
}
memcpy(pPDU->caData, &(pList->pFirstNode->iId)
, sizeof(int));
pPDU->iType = ENUM_MSG_RESPONSE_USR_LIST;
Node *pNode = pList->pFirstNode->pNext;
while (NULL != pNode)
{
sendPDU(pNode->sockfd, pPDU);
pNode = pNode->pNext;
}
}
void handleGroupChat(PDU *pPDU)
{
if (NULL != pPDU)
{
Node *pNode = pList->pFirstNode;
while (NULL != pNode)
{
sendPDU(pNode->sockfd, pPDU);
pNode = pNode->pNext;
}
}
}
void handlePrivateChat(PDU *pPDU)
{
if (NULL != pPDU)
{
Node *pNode = NULL;
pNode = findNode(pList, pPDU->iToId);
if (NULL != pNode)
{
sendPDU(pNode->sockfd, pPDU);
}
}
}
void *handleClient(void *arg)
{
int clientSockfd = (int)arg;
storeClientInfo(clientSockfd);
PDU *pPDU = NULL;
uint iType = 0;
while (1)
{
pPDU = readPDU(clientSockfd);
if (NULL != pPDU)
{
iType = parsePDU(pPDU);
switch (iType)
{
case ENUM_MSG_REQUEST_USR_LIST:
break;
case ENUM_MSG_GROUP_CHAT:
handleGroupChat(pPDU);
break;
case ENUM_MSG_PRIVATE_CHAT:
handlePrivateChat(pPDU);
break;
default:
break;
}
}
}
}
int makeSocket()
{
int sockfd = socket(AF_INET
, SOCK_STREAM
, 0);
if (-1 == sockfd)
{
perror("socket");
exit(EXIT_FAILURE);
}
return sockfd;
}
void makeBind(int sockfd)
{
int ret = -1;
struct sockaddr_in serverAddr;
serverAddr.sin_family = AF_INET; //ipv4
serverAddr.sin_port = htons(8888); //port
//server ip
serverAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
bzero(&(serverAddr.sin_zero), 8);
//将sockfd和地址进行绑定
ret = bind(sockfd, (struct sockaddr *)&serverAddr
, sizeof(serverAddr));
if (-1 == ret)
{
perror("bind");
exit(EXIT_FAILURE);
}
}
void makeListen(int sockfd)
{
int ret = -1;
ret = listen(sockfd, 5);
if (-1 == ret)
{
perror("listen");
exit(EXIT_FAILURE);
}
}
int makeAccept(int sockfd)
{
struct sockaddr_in clientAddr;
int iLen = sizeof(clientAddr);
int clientSockfd = -1;
clientSockfd = accept(sockfd
, (struct sockaddr *)&clientAddr
, &iLen);
if (-1 == clientSockfd)
{
perror("accept");
exit(EXIT_FAILURE);
}
return clientSockfd;
}
void makeHandleClientThread(int sockfd)
{
pthread_t thread;
pthread_create(&thread, NULL, handleClient
, (void *)sockfd);
}
void storeClientInfo(int sockfd)
{
Node *pNode = makeNode();
if (NULL == pNode)
{
return;
}
pNode->iId = iBaseId;
pNode->sockfd = sockfd;
iBaseId++;
insertList(pList, pNode);
}
main.c(server)
#include "server.h"
extern List *pList;
int main(void)
{
pList = makeList();
if (NULL == pList)
{
return -1;
}
int sockfd = -1;
sockfd = makeSocket();
makeBind(sockfd);
makeListen(sockfd);
int clientSockfd = -1;
while (1)
{
clientSockfd = makeAccept(sockfd);
makeHandleClientThread(clientSockfd);
sendUsrListToClient(clientSockfd, pList);
updateClientsUsrList(pList);
}
return 0;
}
link.h
#ifndef LINK_H
#define LINK_H
#include <stdio.h>
typedef struct Node
{
int iId;
int sockfd;
struct Node *pNext;
}Node;
typedef struct List
{
int iLen;
Node *pFirstNode;
}List;
Node *makeNode();
List *makeList();
void insertList(List *pList, Node *pNode);
Node *findNode(const List *pList, int iId);
void showList(const List *pList);
#endif
link.c
#include "link.h"
#include <stdlib.h>
Node *makeNode()
{
Node *pNode = NULL;
pNode = (Node *)malloc(sizeof(Node));
if (NULL != pNode)
{
pNode->iId = 0;
pNode->sockfd = -1;
pNode->pNext = NULL;
}
return pNode;
}
List *makeList()
{
List *pList = NULL;
pList = (List *)malloc(sizeof(List));
if (NULL != pList)
{
pList->iLen = 0;
pList->pFirstNode = NULL;
}
return pList;
}
void insertList(List *pList, Node *pNode)
{
if (NULL == pList || NULL == pNode)
{
return;
}
if (NULL == pList->pFirstNode)
{
pList->pFirstNode = pNode;
}
else
{
pNode->pNext = pList->pFirstNode;
pList->pFirstNode = pNode;
}
pList->iLen++;
}
Node *findNode(const List *pList, int iId)
{
if (NULL == pList)
{
return NULL;
}
Node *pNode = pList->pFirstNode;
while (NULL != pNode)
{
if (pNode->iId == iId)
{
break;
}
pNode = pNode->pNext;
}
return pNode;
}
void showList(const List *pList)
{
if (NULL == pList)
{
return;
}
Node *pNode = pList->pFirstNode;
while (NULL != pNode)
{
printf("id: %d, sockfd: %d\n", pNode->iId
, pNode->sockfd);
pNode = pNode->pNext;
}
printf("-------------------------------\n");
}
protocol.h
#ifndef PROTOCOL_H
#define PROTOCOL_H
#include <stdio.h>
typedef unsigned int uint;
enum ENUM_MSG_TYPE
{
ENUM_MSG_MIN = 0,
ENUM_MSG_PRIVATE_CHAT, //私聊
ENUM_MSG_GROUP_CHAT, //群聊
ENUM_MSG_REQUEST_USR_LIST, //请求用户列表
ENUM_MSG_RESPONSE_USR_LIST, //回复用户列表
ENUM_MSG_MAX = 0x0fffffff
};
typedef struct PDU
{
uint iPDULen; //整个协议数据单元的大小
uint iType; //消息类型:群聊,私聊,获取用户列表
uint iDataLen; //消息的长度
int iFromId; //消息的发送者
int iToId; //消息的接收者
char caData[4]; //要发送的消息
}PDU;
PDU *makePDU(int iDataLen);
uint parsePDU(PDU *pPDU);
void sendPDU(int sockfd, const PDU *pPDU);
PDU *readPDU(int sockfd);
#endif
protocol.c
#include "protocol.h"
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
PDU *makePDU(int iDataLen)
{
PDU *pPDU = NULL;
uint iLen = sizeof(PDU) - 4*sizeof(char) + iDataLen;
pPDU = (PDU *)malloc(iLen);
if (NULL != pPDU)
{
memset(pPDU, 0, iLen);
pPDU->iPDULen = iLen;
pPDU->iType = ENUM_MSG_MIN;
pPDU->iDataLen = iDataLen;
}
return pPDU;
}
uint parsePDU(PDU *pPDU)
{
uint iType = ENUM_MSG_MIN;
if (NULL != pPDU)
{
iType = pPDU->iType;
}
return iType;
}
void sendPDU(int sockfd, const PDU *pPDU)
{
if (sockfd < 0 || NULL == pPDU)
{
return;
}
int ret = -1;
int iLeft = pPDU->iPDULen;
int iSended = 0;
while (iLeft)
{
ret = write(sockfd, (char *)pPDU+iSended, iLeft);
if (-1 == ret)
{
if (EINTR == errno)
{
continue;
}
perror("write");
return;
}
iSended += ret;
iLeft -= ret;
}
}
PDU *readPDU(int sockfd)
{
int ret = -1;
uint iPDULen = 0;
ret = read(sockfd, &iPDULen, sizeof(uint));
if (-1 == ret)
{
perror("read");
return NULL;
}
PDU *pPDU = makePDU(iPDULen-3*sizeof(int));
if (NULL == pPDU)
{
return NULL;
}
pPDU->iPDULen = iPDULen;
int iLeft = iPDULen - sizeof(int);
int iReaded = sizeof(int);
while (iLeft)
{
ret = read(sockfd, (char *)pPDU+iReaded, iLeft);
if (-1 == ret)
{
if (EINTR == errno)
{
continue;
}
perror("while read");
return NULL;
}
iLeft -= ret;
iReaded += ret;
}
return pPDU;
}